Woolworth Building, switchboard.

Woolworth Building. Detail of switchboard.

Woolworth Building, vault.

Woolworth Building, rendering.

Woolworth Building, boiler room.

Woolworth Building, engine room.

Woolworth Building. Swimming tank.

Woolworth Building. Pump room.

Woolworth Building. Boiler room.

Woolworth Building, general exterior.

Woolworth Building, engine room.

Woolworth Building, swimming tank.

Woolworth Building

Woolworth Building, engine room.

Woolworth Building. Engine room.

Woolworth Building. Grand staircase.

Woolworth Building. Grand staircase.

Woolworth Building, boiler room.

233 Broadway. Woolworth Building.

Woolworth Building, general exterior.